/*
 * TazioStarter.java   ver    16 Nov 2009
 * 
 * Copyright (c) 2009 mentalsmash.org
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * The use of the Apache License does not indicate that this project is
 * affiliated with the Apache Software Foundation.
 */
package org.mentalsmash.tazio.impl;

import org.mentalsmash.tazio.Tazio;
import org.mentalsmash.tazio.TazioRuntimeException;
import org.mentalsmash.tazio.transactions.control.impl.WRMTransactionManager;
import org.mentalsmash.tazio.transactions.modules.WRMTransactionsModule;
import org.mentalsmash.tazio.transactions.user.Share;
import org.mentalsmash.tazio.transactions.user.UserTransactionManager;

import com.google.inject.Guice;
import com.google.inject.Injector;

/**
 * @author Andrea Reale
 * @version 0.0.1
 * 
 */
public class TazioStarter implements Tazio {

    private WRMTransactionManager transactionManager;
    private Share aShare;

    private volatile boolean initialized;

    public TazioStarter() {
	initialized = false;
	transactionManager = null;
	aShare = null;
    }

    @Override
    public Share getShare() {
	if (!initialized) {
	    throw new TazioRuntimeException("call initTazio() first");
	}
	return this.aShare;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.mentalsmash.tazio.Tazio#getTransactionManager()
     */
    @Override
    public UserTransactionManager getTransactionManager() {
	if (!initialized) {
	    throw new TazioRuntimeException("call initTazio() first");
	}
	return this.transactionManager;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.mentalsmash.tazio.Tazio#initTazio()
     */
    @Override
    public synchronized void initTazio() {
	if (!initialized) {
	    Injector tazioInjector = Guice
		    .createInjector(new WRMTransactionsModule());
	    this.transactionManager = tazioInjector
		    .getInstance(WRMTransactionManager.class);
	    this.aShare = tazioInjector.getInstance(Share.class);

	    initialized = true;
	}

    }

}
